CN209851597U

CN209851597U - Photocuring 3D printer

Info

Publication number: CN209851597U
Application number: CN201920649422.XU
Authority: CN
Inventors: 林世旺
Original assignee: Shenzhen Nova Robot Technology Co Ltd
Current assignee: Shenzhen Nova Robot Technology Co Ltd
Priority date: 2019-05-07
Filing date: 2019-05-07
Publication date: 2019-12-27
Anticipated expiration: 2029-05-07

Abstract

The utility model provides a photocuring 3D printer, this photocuring 3D printer include base, elevating system, print platform subassembly and LED dot matrix screen. Wherein, be equipped with the silo on the base, the silo is used for holding the photocuring raw materials. The lifting mechanism is arranged on the base. The printing platform assembly is arranged on the lifting mechanism. The printing platform assembly comprises a printing platform which is positioned right above the material groove. The LED dot matrix screen is arranged inside the base. The LED dot matrix screen is located under the trough, and the LED dot matrix screen selects an ultraviolet light source with a wavelength range of 365-405 nm. In the technical scheme of the utility model, because of no blocking of the liquid crystal screen, the ultraviolet light source directly irradiates the photocuring raw material of the trough, the photocuring time can be greatly reduced, thereby improving the printing efficiency; in addition, the light-emitting uniformity of the LED dot matrix screen is obviously higher than that of an LCD screen, and the precision of screen photocuring 3D printing is greatly improved.

Description

Photocuring 3D printer

Technical Field

The utility model relates to a 3D prints technical field, in particular to photocuring 3D printer.

Background

3D printing is a novel rapid prototyping manufacturing technology, and products are manufactured by a multilayer superposition growth principle. Currently, the most applied 3D printing technology is photocuring 3D printing. The material used by the photocuring 3D printer is generally "photosensitive resin", is usually in a liquid state, is prepared with a certain photoinitiator, and is subjected to polymerization reaction under the irradiation of light to complete curing. The existing photocuring 3D printer often adopts a liquid crystal display (LCD screen) as a printing screen to provide a light source for initiating curing for the photocuring raw material. However, the technical problems of low printing precision and long printing time consumption exist when the liquid crystal display screen is used as a printing screen, because the liquid crystal display screen needs to emit light by means of UV backlight, as shown in fig. 1, the UV backlight needs to penetrate through the liquid crystal screen to irradiate the light curing raw material, and the loss of the UV backlight penetrating through the liquid crystal screen is as high as 97% -99.5%, so that the light curing time consumption is caused by the deficiency of an irradiation light source, and the printing precision is also influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a photocuring 3D printer aims at solving among the prior art photocuring 3D printer photocuring long-consuming time, printing precision and the technical problem of printing inefficiency.

In order to achieve the above object, the utility model provides a photocuring 3D printer, photocuring 3D printer includes base, elevating system, print platform subassembly and LED dot matrix screen. The base is provided with a trough used for containing a photocuring raw material; the lifting mechanism is arranged on the base; the printing platform assembly is arranged on the lifting mechanism and comprises a printing platform, and the printing platform is positioned right above the material tank; the LED dot matrix screen is arranged in the base, the LED dot matrix screen is located under the trough, and an ultraviolet light source with the wavelength ranging from 365 nm to 405nm is selected for the LED dot matrix screen.

Preferably, the distance between the LED dot matrix screen and the trough ranges from 0 mm to 0.2 mm.

Preferably, the LED dot matrix screen is attached to the bottom of the trough.

Preferably, the distance range of the lamp beads in the LED dot matrix screen is 0.05-0.5 mm.

Preferably, the interval range of the lamp beads in the LED dot matrix screen is 0.2-0.4 mm.

Preferably, the printing platform assembly further comprises a platform fixing seat and a cantilever, the printing platform is rigidly connected with the platform fixing seat or integrally formed, and the platform fixing seat is rigidly connected with the cantilever or integrally formed.

Preferably, elevating system includes sharp module and sharp module fixing base, sharp module install in sharp module fixing base, sharp module fixing base can level land install in the base.

Preferably, sharp module fixing base pass through the leveling subassembly install in the base, the leveling subassembly includes leveling bolt and anti-loosening member, sharp module fixing base is seted up along the first mounting hole that runs through of upper and lower direction, leveling bolt with first mounting hole screw-thread fit, anti-loosening member is located leveling bolt's nut with between the sharp module fixing base, anti-loosening member is used for the fastening leveling bolt with be connected between the sharp module fixing base.

Preferably, the photocuring 3D printer still includes the image control unit, the image control unit with LED dot matrix screen electricity is connected, the image control unit is used for transmitting image data for LED dot matrix screen.

The utility model provides a photocuring 3D printer adopts the LED dot matrix screen as printing the screen, and the LED dot matrix screen sets up under the silo, and the LED dot matrix screen chooses for use the ultraviolet light source that wavelength range is 365 ~ 405 nm. In the technical scheme of the utility model, because of no blocking of the liquid crystal screen, the ultraviolet light source directly irradiates the photocuring raw material of the trough, the photocuring time can be greatly reduced, thereby improving the printing efficiency; in addition, the light-emitting uniformity of the LED dot matrix screen is obviously higher than that of an LCD screen, and the precision of screen photocuring 3D printing is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic diagram of a structure and light emission of a liquid crystal display screen in a conventional photocuring 3D printer;

fig. 2 is a schematic structural diagram of an embodiment of the photocuring 3D printer of the present invention;

fig. 3 is a schematic view of the structure and light emission of an LED dot matrix screen in the photocuring 3D printer shown in fig. 2.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Photocuring 3D printer	10	Base seat
11	Material groove	20	Lifting mechanism
				21	Linear module	22	Linear module fixing seat
30	Platform fixing assembly	31	Platform fixing seat
				32	Cantilever arm	40	Printing platform
50	Leveling assembly	51	Leveling bolt
				52	Anti-loose piece	60	LED lattice screen
61	Lamp bulb

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.

In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a photocuring 3D printer, please refer to fig. 2 and 3 and show, fig. 2 is the utility model discloses the structural schematic diagram of photocuring 3D printer embodiment, fig. 3 is the structure and the luminous schematic diagram of LED dot matrix screen in the photocuring 3D printer that fig. 2 is shown.

The utility model discloses an embodiment, this photocuring 3D printer 1 includes base 10, elevating system 20, print platform 40 subassembly and LED dot matrix screen 60. Wherein, a trough 11 is arranged on the base 10, and the trough 11 is used for containing the light-curing raw material. The elevating mechanism 20 is mounted on the base 10. The printing platform 40 assembly is mounted to the lift mechanism 20. The printing platform 40 assembly includes a printing platform 40, the printing platform 40 being located directly above the chute 11. The LED dot matrix screen 60 is provided inside the base 10. The LED dot matrix screen 60 is located under the trough 11, and the LED dot matrix screen 60 selects an ultraviolet light source with a wavelength range of 365-405 nm.

In this embodiment, the work process of the photocuring 3D printer 1 is as follows: elevating system 20 drive print platform 40 descends and sinks in silo 11, photocuring 3D printer 1 is connected with the computer, LED dot matrix screen 60 provides the light source for silo 11 according to the image that the image control unit provided, the photocuring raw materials in silo 11 solidifies the shaping gradually under the illumination of light source and is a printing layer to on being attached to print platform 40, elevating system 20 drive print platform 40 rises the height of a printing layer, simultaneously, LED dot matrix screen 60 continues the photocuring raw materials and forms the next printing layer.

It should be noted that, as shown in fig. 2, the LED dot matrix screen 60 is composed of a plurality of light beads 61 (light emitting diodes), and the light beads 61 are turned on and off to display characters, pictures, animation, video and the like, and is a display device with all components modularized, and generally composed of a display module, a control system and a power supply system. The utility model provides a LED dot matrix screen 60 chooses the ultraviolet light source that the wavelength range is 365 ~ 405nm for use, has advantages such as solidification speed is fast, energy-conservation and environmental protection.

In the prior art, a screen photocuring 3D printer adopts a liquid crystal display screen as a printing screen, and uses a liquid crystal display LCD imaging principle to provide image signals by a computer program under the drive of a computer and a display screen driving circuit, so that a selective transparent area appears on the liquid crystal screen. Under the irradiation of an ultraviolet light source (UV backlight), the image transparent region of the liquid crystal screen is less blocked from ultraviolet light, and in a region where no image is displayed, ultraviolet light is blocked. The ultraviolet light transmitted through the liquid crystal panel constitutes an ultraviolet image region. The ultraviolet light irradiates the liquid light-cured resin through the transparent trough, so that the resin irradiated by the ultraviolet light generates a curing reaction to become a solid state. The opaque part of the liquid crystal screen shields ultraviolet rays, the liquid light curing resin of the shielded part still keeps liquid state because the liquid light curing resin is not irradiated by the ultraviolet rays, and the cured resin becomes a product or a part for forming the product. That is to say, the existing screen photocuring 3D printer 1 needs to use a liquid crystal screen to display an image, as shown in fig. 1, however, an ultraviolet light source must pass through the liquid crystal screen to irradiate the trough, but the loss of the ultraviolet light source passing through the liquid crystal screen is as high as 97% -99.5%, the intensity of the ultraviolet light is greatly reduced, and thus, the shortage of the irradiation light source can cause the photocuring time consumption, and at the same time, the printing precision can also be affected.

The utility model provides a photocuring 3D printer 1 adopts the LED dot matrix screen as printing screen, chooses the ultraviolet light source that wavelength range is 365 ~ 405nm for use, because there is not the blocking of LCD screen, the ultraviolet light source directly shines the photocuring raw materials of silo, has reduced the photocuring time greatly to improve printing efficiency; in addition, the light-emitting uniformity of the LED dot matrix screen is obviously higher than that of an LCD screen, and the precision of screen photocuring 3D printing is greatly improved.

Further, the distance between the LED dot matrix screen 60 and the trough 11 ranges from 0 mm to 0.2 mm. It can be understood that the distance between the LED dot matrix screen 60 and the trough 11 should not be too large, and if the distance between the LED dot matrix screen and the trough is too large, on one hand, the intensity of the ultraviolet light received by the light-cured raw material is reduced; on the other hand, due to the divergence of the light, the uv light diverges from the gap between the LED dot matrix screen 60 and the trough 11, thereby affecting the integrity and sharpness of the image impinging on the trough 11.

In this embodiment, the LED dot matrix screen 60 is attached to the bottom of the trough 11. So set up, can the minimize interval between LED dot matrix screen 60 and the photocuring raw materials, improve the intensity of the ultraviolet light that the photocuring raw materials received to shorten the photocuring required time.

Further, the distance range of the lamp beads 61 in the LED dot matrix screen 60 is 0.05-0.5 mm. Preferably, the distance range of the lamp beads 61 in the LED dot matrix screen 60 is 0.2-0.4 mm. Because LED dot matrix screen 60 shows the image of waiting to print with lamp pearl 61 bright and dark, in order to guarantee the definition and the luminous homogeneity of image, the interval of lamp pearl 61 needs be in suitable scope in this embodiment LED dot matrix screen 60. If the distance between the lamp beads 61 in the LED dot matrix screen 60 is too large, the image definition is insufficient, and there are significant gaps between the light sources emitted by the lamp beads 61, and there may be burrs on the printed product or the product forming part.

Further, as shown in fig. 2, the platform fixing assembly 30 includes a platform fixing seat 31 and a cantilever 32, wherein the printing platform 40 is rigidly connected to or integrally formed with the platform fixing seat 31, the platform fixing seat 31 is rigidly connected to or integrally formed with the cantilever 3232, and the cantilever 32 is rigidly connected to or integrally formed with the sliding table of the lifting mechanism 20. By the arrangement, the condition that the parallelism of the printing platform 40 relative to the printing screen is deviated in the printing process can be effectively avoided. In addition, it can be understood that the lifting mechanism 20 drives the cantilever 32 to ascend or descend so as to drive the platform fixing seat 31 and the printing platform 40 to ascend or descend.

Further, elevating system 20 includes sharp module 21 and sharp module fixing base 22, and sharp module 21 can be adjusted flatly and install in sharp module fixing base 22. In this embodiment, the linear module fixing base 22 is installed on the base 10 through the leveling component 50. In other embodiments, the linear module holder 22 can be installed on the base 10 in other ways.

Further, sharp module fixing base 22 passes through leveling subassembly 50 to be installed in base 10, and leveling subassembly 50 includes leveling bolt 51 and locking piece 52, and sharp module fixing base 22 sets up the first mounting hole that runs through along upper and lower direction, leveling bolt 51 with first mounting hole screw-thread fit, locking piece 52 is located between leveling bolt 51's nut and sharp module fixing base 22, locking piece 52 is used for fastening be connected between leveling bolt 51 and the sharp module fixing base 22. It can be understood that before the photocuring 3D printer 1 works, the height and the parallelism of the periphery of the linear module fixing seat 22 relative to the base 10 can be adjusted by rotating the leveling bolt 51, so as to pre-level the lifting mechanism 20 (equivalent to leveling the printing platform 40), and then the leveling bolt 51 is locked by the anti-loosening piece 52 after pre-leveling, and in addition, the linear module fixing seat 22 is fixed on the base 10 by the fastening piece. In this embodiment, the check member 52 includes a nut, a spring washer, and a flat washer.

In an embodiment, the light-cured 3D printer 1 further includes an image control unit (not shown in the drawings), the image control unit is electrically connected to the LED dot matrix screen 60, and the image control unit is configured to transmit image data to the LED dot matrix screen 60. Specifically, the image control unit includes a computer, the computer is electrically connected to the LED dot matrix screen 60, the computer provides an image signal to be printed to the LED dot matrix screen 60, the LED dot matrix screen 60 emits an ultraviolet light according to the received image signal and directly irradiates into the trough 11, and the photocuring material in the trough 11 is cured and formed into a printing layer under the irradiation of the ultraviolet light and attached to the printing platform 40.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims

1. A photocuring 3D printer, comprising:

the light curing device comprises a base, wherein a material groove is formed in the base and is used for containing a light curing raw material;

the lifting mechanism is arranged on the base;

the printing platform assembly is arranged on the lifting mechanism and comprises a printing platform, and the printing platform is positioned right above the material groove;

the LED dot matrix screen is arranged in the base, the LED dot matrix screen is located under the trough, and an ultraviolet light source with the wavelength range of 365-405 nm is selected for the LED dot matrix screen.

2. The photocuring 3D printer of claim 1, wherein the LED dot matrix screen is spaced from the trough by a distance in the range of 0-0.2 mm.

3. The photocuring 3D printer of claim 2, wherein the LED dot matrix screen is affixed to the bottom of the gutter.

4. The photocuring 3D printer of claim 3, wherein the spacing range of the lamp beads in the LED dot matrix screen is 0.05-0.5 mm.

5. The photocuring 3D printer of claim 4, wherein the spacing range of the lamp beads in the LED dot matrix screen is 0.2-0.4 mm.

6. The photocuring 3D printer of claim 5, the print platform assembly further comprising a platform mount and a cantilever, the print platform being rigidly connected to or integrally formed with the platform mount, the platform mount being rigidly connected to or integrally formed with the cantilever.

7. The photocuring 3D printer of claim 6, wherein the lifting mechanism includes a linear module and a linear module mount, the linear module being mounted to the linear module mount, the linear module mount being flatly mountable to the base.

8. The photocuring 3D printer of claim 7, wherein the linear module fixing base is mounted to the base through a leveling component, the leveling component includes a leveling bolt and an anti-loosening member, the linear module fixing base is provided with a first mounting hole penetrating in an up-down direction, the leveling bolt is in threaded fit with the first mounting hole, the anti-loosening member is located between a nut of the leveling bolt and the linear module fixing base, and the anti-loosening member is used for fastening connection between the leveling bolt and the linear module fixing base.

9. The photocuring 3D printer of any one of claims 1-8, further comprising an image control unit, the image control unit being electrically connected to the LED dot matrix screen, the image control unit being configured to transmit image data to the LED dot matrix screen.